A test bench and a test method for high-temperature saturated water circulation

Abstract

The application discloses a kind of high-temperature saturated water circulation test bench and test method, including pipeline, the pipeline is divided into main pipeline and detection pipeline, main pipeline is communicated with detection pipeline;Main pipeline is connected with high-temperature high-pressure shielding pump, gas pocket and electric heating water storage tank;Its characterized in that the main pipeline is installed with several ceramic electric heating coil, ceramic electric heating coil is connected with electric heating control cabinet by electric wire;Valve is connected on the detection pipeline, and pressure gauge and thermometer are connected on the detection pipeline at both ends of valve.This test bench can detect the performance of valve in various ways, including sealing, high-temperature impact resistance, low-temperature high-pressure resistance and high-temperature high-pressure resistance, and can accurately detect the performance of valve to make the safety of valve higher.

Description

Technical Field

[0001] This invention relates to valve testing, specifically to a test bench and test method for high-temperature saturated water circulation. Background Technology

[0002] Currently, the known high-temperature test bench media for valve performance testing are generally gaseous high-temperature steam. However, the pressure of steam is difficult to control. Many high-temperature valves actually operate under liquid conditions; for example, valves in nuclear power plants require testing with high-temperature, high-pressure water. The difference between the test medium and the actual operating medium makes it impossible to accurately test valve performance, and prolonged exposure to high-temperature steam can damage the valve sealing surfaces. Some tests use saturated water as the medium, but the temperature drops when the water becomes saturated, making temperature and pressure difficult to control. Therefore, this paper proposes a high-temperature saturated water circulation test bench and testing method. Summary of the Invention

[0003] The purpose of this invention is to provide a test bench and test method for high-temperature saturated water circulation in order to solve the above problems.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a test bench and test method for high-temperature saturated water circulation, comprising a pipeline, wherein the pipeline is divided into a main pipeline and a test pipeline, the main pipeline being connected to the test pipeline; the main pipeline is connected to a high-temperature high-pressure shielded pump, an air tank, and an electrically heated water storage tank; characterized in that a plurality of ceramic electric heating coils are installed on the main pipeline, and the ceramic electric heating coils are connected to an electric heating control cabinet via wires; a valve is connected to the test pipeline, and a pressure gauge and a thermometer are connected to the test pipelines at both ends of the valve.

[0005] Further preferably, the detection pipeline on one side of the valve is also provided with a pressure boosting port and a right shut-off valve.

[0006] More preferably, the detection pipeline on the other side of the valve is provided with a sealing detection pipe and a left shut-off valve, and the detection pipeline is also provided with a steam discharge port, and a steam discharge valve is provided at the steam discharge port.

[0007] More preferably, a safety valve is installed on the top of the air tank.

[0008] More preferably, the air bag is also connected to an air pipe, and an air shut-off valve is installed on the air pipe; the air bag is connected to a gas compression pump through the air pipe.

[0009] In a further preferred embodiment, the detection pipeline is also connected in parallel with a normally open pipeline, and a shut-off valve is installed on the normally open pipeline.

[0010] Before conducting the test, water is pressurized into the pipeline to expel the air from the pipeline.

[0011] When performing a sealing performance test, close the shut-off valve, the left shut-off valve, and the valve; observe whether there is water leakage in the sealing test tube to observe the quality of the sealing performance.

[0012] The following tests can only be carried out after the sealing performance test is qualified. During the test, the shut-off valve must be in the normally open state to prevent the pressure from rising suddenly.

[0013] During high-temperature impact testing: The ceramic electric heating coil is powered by the electric heating control cabinet to heat the main pipeline and raise the temperature of the water in the pipeline. The water is then circulated by a high-temperature, high-pressure shielded pump to ensure uniform water temperature. Then, gas is added to the water in the test pipeline through the pressurization port, which accelerates the flow rate of the water as it flows towards the valve, generating an impact and subjecting the valve to high-temperature impact to test its resistance to high-temperature impact. When using high-temperature water, the steam exhaust valve is opened to allow steam to be discharged from the steam exhaust port, preventing the accumulation of steam in the pipeline and avoiding excessive pressure that could lead to an explosion.

[0014] When performing low temperature and high pressure operation, water is kept at room temperature and circulated in the pipeline. Gas is supplied to the gas tank by a gas compression pump to increase the pressure inside the gas tank, so that the water flowing out of the gas tank is high pressure water. The valve is tested by using low temperature and high pressure water to test the valve's performance under low temperature and high pressure conditions.

[0015] When operating at high temperature and high pressure, the ceramic electric heating coil is powered by the electric heating control cabinet to heat the main pipeline, thereby heating the water in the pipeline. Then, the gas compressor pump supplies gas to the gas tank to increase the pressure inside the gas tank, so that the water flowing out of the gas tank is high temperature and high pressure water. The valve is tested by the high temperature and high pressure water to test the valve's performance under high temperature and high pressure conditions.

[0016] This invention, through the design of the test bench, can test valves in various performance aspects, including sealing performance, high temperature shock resistance, low temperature high pressure resistance, and high temperature high pressure resistance; it can accurately test the performance of valves, thus improving valve safety. Attached Figure Description

[0017] Appendix Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Appendix Figure 2 This is a schematic diagram of the structure along direction A of the present invention;

[0019] Appendix Figure 3 This is a schematic diagram of the structure along direction B of the present invention.

[0020] Legend: 1. Pipeline; 2. Main pipeline; 3. Detection pipeline; 4. High-temperature and high-pressure shielded pump; 5. Gas tank; 6. Electric heating water storage tank; 7. Ceramic electric heating coil; 8. Electric heating control cabinet; 9. Valve; 10. Pressure gauge; 11. Thermometer; 12. Booster port; 13. Right shut-off valve; 14. Sealing detection tube; 15. Left shut-off valve; 16. Steam vent; 17. Steam vent valve; 18. Safety valve; 19. Gas pipe; 20. Gas shut-off valve; 21. Gas compression pump; 22. Normally open pipeline; 23. Shut-off valve. Detailed Implementation

[0021] The following description, in conjunction with the accompanying drawings, further illustrates the experimental setup and method for high-temperature saturated water circulation according to the present invention.

[0022] like Figure 1-3 As shown in the figure, a test bench and test method for high-temperature saturated water circulation in this embodiment includes a pipeline 1, which is divided into a main pipeline 2 and a test pipeline 3, with the main pipeline 2 connected to the test pipeline 3; the main pipeline 2 is connected to a high-temperature high-pressure shielded pump 4, an air tank 5, and an electrically heated water storage tank 6; characterized in that a plurality of ceramic electric heating coils 7 are installed on the main pipeline 2, and the ceramic electric heating coils 7 are connected to an electric heating control cabinet 8 via wires; a valve 9 is connected to the test pipeline 3, and pressure gauges 10 and thermometers 11 are connected to the test pipeline 3 at both ends of the valve 9; the test pipeline 3 on one side of the valve 9 is equipped with a pressure gauge 10 and a thermometer 11. The testing pipeline 3 is also equipped with a pressurization port 12 and a right shut-off valve 13; the testing pipeline 3 on the other side of the valve 9 is equipped with a sealing testing pipe 14 and a left shut-off valve 15, the testing pipeline 3 is also equipped with a steam discharge port 16, and a steam discharge valve 17 is also equipped at the steam discharge port 16; a safety valve 18 is installed on the top of the gas tank 5; a gas pipe 19 is also connected to the gas tank 5, and a gas shut-off valve 20 is installed on the gas pipe 19; a gas compression pump 21 is connected to the gas tank 5 through the gas pipe 19; a normally open pipeline 22 is also connected in parallel to the testing pipeline 3, and a shut-off valve 23 is installed on the normally open pipeline 22.

[0023] The working process of this invention is as follows: First, water is pressurized into pipe 1 to expel the air in pipe 1. When testing the sealing performance of valve 9, the shut-off valve 23 and the left shut-off valve 15 are closed, and valve 9 is closed at the same time. Observe whether there is water leakage in the sealing test tube 14. If there is water leakage, it means that the sealing effect of valve 9 is not good. If there is no water leakage, it means that the sealing performance is good.

[0024] The following tests can only be performed after the sealing performance of valve 9 has passed the test. During the following tests, the shut-off valve 23 must be in the normally open state to prevent the pressure from rising suddenly.

[0025] During high-temperature impact testing: First, the ceramic electric heating coil 7 is powered by the electric heating control cabinet 8 to start working and heat the main pipeline 2, thereby heating the water in pipeline 1. Then, the water in pipeline 1 is circulated by the high-temperature and high-pressure shielded pump 4 to ensure uniform water temperature. Next, the water in the test pipeline 3 is aerated through the pressure booster port 12, which accelerates the flow rate of the water in pipeline 1 as it flows towards valve 9, generating an impact and subjecting valve 9 to high-temperature impact testing to assess its resistance to high-temperature impact. When using high-temperature water, the steam discharge valve 17 is opened to allow steam to be discharged from the steam discharge port 16, preventing the accumulation of steam in pipeline 1 and avoiding excessive pressure that could lead to an explosion.

[0026] When performing low temperature and high pressure, water is kept at room temperature and circulates in pipeline 1. Gas is supplied to gas tank 5 through gas compression pump 21 to increase the pressure in gas tank 5, so that the water flowing out of gas tank 5 is high pressure water. Valve 9 is tested by low temperature and high pressure water to test the performance of valve 9 under low temperature and high pressure medium.

[0027] When operating under high temperature and high pressure, the ceramic electric heating coil 7 is powered by the electric heating control cabinet 8 to start working and heat the main pipeline 2, thereby heating the water in the pipeline 1. Then, the gas compressor pump 21 supplies gas to the air tank 5 to increase the pressure inside the air tank 5, so that the water flowing out of the air tank 5 is high temperature and high pressure water. The valve 9 is tested by the high temperature and high pressure water to test the performance of the valve 9 under the condition of high temperature and high pressure of the medium.

[0028] The beneficial effects of this invention are as follows: The test bench design allows for the testing of various performance characteristics of valve 9, including sealing performance, high-temperature impact resistance, low-temperature high-pressure resistance, and high-temperature high-pressure resistance; it enables precise testing of valve 9's performance, thus enhancing its safety; the inclusion of ceramic electric heating coil 7, electric heating control cabinet 8, and electric heating water tank 6 ensures stable control of the water temperature within pipeline 1; the high-temperature high-pressure shielded pump 4 prevents uneven heating of the water circulation within pipeline 1; the air reservoir 5 and gas compression pump 21 stabilize the pressure within pipeline 1; the steam discharge port 16 and steam discharge valve 17 allow steam to be discharged from the steam discharge port 16 when using high-temperature water, preventing accumulation in pipeline 1 and thus preventing pipeline 1 explosion due to excessive pressure; and the sealing performance of valve 9 can be tested using the sealing detection tube 14.

[0029] The scope of protection of this invention is not limited to the above embodiments and their variations. Conventional modifications and substitutions made by those skilled in the art based on the content of these embodiments are all within the scope of protection of this invention.

Claims

1. A test method for high temperature, saturated water circulation, characterized by The test method is applied to a test bench for high-temperature saturated water circulation. The test bench includes a pipeline (1), which is divided into a main pipeline (2) and a test pipeline (3). The main pipeline (2) is connected to the test pipeline (3). The main pipeline (2) is connected to a high-temperature high-pressure shielded pump (4), an air tank (5), and an electric heating water storage tank (6). Several ceramic electric heating coils (7) are installed on the main pipeline (2). The ceramic electric heating coils (7) are connected to an electric heating control cabinet (8) via wires. A valve (9) is connected to the test pipeline (3). A pressure gauge (10) and a thermometer (11) are connected to the test pipeline (3) at both ends of the valve (9). The detection pipeline (3) on one side of the valve (9) is also equipped with a pressure boosting port (12) and a right shut-off valve (13). On the other side of the valve (9), the detection pipeline (3) is provided with a sealing detection pipe (14) and a left shut-off valve (15). The detection pipeline (3) is also provided with a steam discharge port (16), and a steam discharge valve (17) is also provided at the steam discharge port (16). The detection pipeline (3) is also connected in parallel to a normally open pipeline (22), and a shut-off valve (23) is installed on the normally open pipeline (22). Before conducting the test, water is pressurized into the pipeline to expel the air from the pipeline. When performing a sealing performance test, close the shut-off valve, the left shut-off valve, and the valve; observe whether there is water leakage in the sealing test tube to observe the quality of the sealing performance. After the sealing performance test is passed, the following tests shall be performed. During the test, the shut-off valve must be in the normally open state to prevent the pressure from rising suddenly. During high-temperature impact testing: The ceramic electric heating coil is powered by the electric heating control cabinet to heat the main pipeline and raise the temperature of the water in the pipeline. The water is then circulated by a high-temperature, high-pressure shielded pump to ensure uniform water temperature. Then, gas is added to the water in the test pipeline through the pressurization port, which accelerates the flow rate of the water as it flows towards the valve, generating an impact and subjecting the valve to high-temperature impact to test its resistance to high-temperature impact. When using high-temperature water, the steam exhaust valve is opened to allow steam to be discharged from the steam exhaust port, preventing the accumulation of steam in the pipeline and avoiding excessive pressure that could lead to an explosion. When performing low-temperature and high-pressure testing, water is kept at room temperature and circulated in the pipeline. Gas is supplied to the gas tank by a gas compression pump to increase the pressure inside the gas tank, so that the water flowing out of the gas tank is high-pressure water. The valve is tested by using low-temperature and high-pressure water to test the valve's performance under low-temperature and high-pressure media conditions. During high-temperature and high-pressure testing, the ceramic electric heating coil is powered by the electric heating control cabinet to heat the main pipeline, thereby heating the water in the pipeline. Then, the gas is supplied to the gas tank by the gas compression pump to increase the pressure inside the gas tank, so that the water flowing out of the gas tank is high-temperature and high-pressure water. The valve is tested by the high-temperature and high-pressure water to test the valve's performance under high-temperature and high-pressure conditions.

2. The test method of claim 1, wherein: A safety valve (18) is installed on the top of the air bag (5).

3. A test method of a high temperature saturated water cycle according to claim 2, characterized in that: The air bag (5) is also connected to an air pipe (19), and an air shut-off valve (20) is installed on the air pipe (19); the air bag (5) is connected to a gas compression pump (21) through the air pipe (19).

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